700r4 gave up the ghost!

[leftybass209]

Ever take your truck on a trip purposely to find some kinks and diagnose faults? I did, and found more than I expected!

I was trying to figure out why my trans was shifting 1-2 at 10mph, 2-3 at 20-22mph, and 3-4 at 30-32mph.

At around 45 mph I tried to test my 4-3 downshift and it started winding higher, like it was in neutral. I coasted around the corner and shut it down. Fired it back up and went through every gear.... nothing. Didn't try to move regardless of RPM.

Had it towed to my favorite trans shop and we did some diagnosing. We assumed torque converter snapped clean at it's cast hub, or the pump was toast. Looks like the pump failed.

I gave him the okay to do a full tear down and inspection, as I'm not sure the condition of the trans.

I'm considering my options now. Not sure if I want to go ahead with a rebuild of the 700r4, or swap to a TH350. My dilemma is, I have a 3.07 rear gear, which I know is not ideal, and needs to be changed. Based on the diagnosis, I'll see if the funds are available for a diff and 700r4 rebuild, or just swap to a TH350.